| 主权项 |
1. A device for supplying power to an inductive load (1) comprising:
a switching structure (M1-M4) comprising at least one power switch and designed to control a current in the load, and means for detecting anomalies (5, 6) designed to generate information on detection or information on non-detection of an anomaly of the short-circuit type in the cabling of the load, in combination with information on validity of the information on anomaly non-detection which is unset by default,in which the means for detecting anomalies comprise:
means for measuring current designed to measure the current in the power switch within a detection time window (T_diag) during which the switching structure is held in a given configuration in which the power switch is closed, andmeans of comparison designed to compare the measured current with a short-circuit current threshold (I_oc) and with an intermediate current threshold (I_int) lower than the short-circuit current threshold,and in which, the detection time window (T_diag) being composed of a reference time window (T_diag1) following the closure of the power switch and also, where necessary, of an auxiliary time window (T_diag2) following a moment in time (t1) when the measured current exceeds the intermediate current threshold (I_Int), the means of comparison are furthermore designed to:
deliver (FIG. 6b) the information on anomaly detection and set the validity information if the measured current reaches the short-circuit current threshold (I_oc) before the end of the reference time window (T_diag1),deliver (FIG. 6a) the information on anomaly non-detection and set the validity information, if the measured current remains lower than intermediate current threshold (I_int) until the expiration of the reference time window (T_diag1),deliver (FIGS. 6c and 6e) the information on anomaly non-detection and set the validity information if the measured current becomes higher than the intermediate current threshold (I_int) before the end of the reference time window (T_diag1), but remains lower than the short-circuit current threshold (I_oc) until the end of the detection time window (T_diag), anddeliver (FIGS. 6d and 6f) the information on anomaly detection and set the validity information if the measured current becomes higher than the intermediate current threshold (I_int) before the end of the reference time window (T_diag1), but becomes higher than the short-circuit current threshold (I_oc) before the end of the detection time window (T_diag). |
